[Walt Fricke]

The 911 transmission used the first of the pull clutches (which the 915 continued to use). But how to get a cable to push on a clutch release lever arm which is on the left (driver's) side of everything. Cables are made to pull, not push.

Well, fix the end of the cable aft of the arm, and have the thick Boudin (?sp) tube (part 58), which runs from the firewall through that holder and inside of which the cable runs, be in an arc and not just a straight tube. When you step on the clutch you tension the cable. That straightens the tube/sleeve, making it effectively longer, and, via the intermediate bits, pushes on the release lever.

You can see why this system needs the guide holder John emphasizes to keep the sleeve/tube more or less in place.

It only took Porsche two years to realize this wasn't the best system for a pull TOB/clutch PP, so in '72 we got the 915.